frede



April 24, 192.8.

C. F. FREDE CAR UNDERFRAME Filed Feb.21, 1927 2 Sheets-Sheet l April 24,1928.

Patented Apr. 24, 1928.

retains UNITED STATES PATENT OFFICE.

CHARLES F. FREEZE, OF ST. LOUIS. MISSOURI, ASSIGNOR TO OOIVIINGNXVEALTHSTEEL COMPANY, OF GRANITE CITY. ILLINOIS. A CORPORATION OF NEW JERSEY.

CAR UNDERFRAME.

Application filed February 21, 1927. Serial No. 189,926.

My invention relates to railway rolling stock and consists in animproved railway underframe construction.

rlhe object of my invention is to provide a railway under-frameconsisting entirely, or in a large party` of a single member, andpreferably of a cast-ing in which extensivo normally `flat surfaces arecorrugated as more particularly described below. Such lll corrugation isfor the purpose of strengthening or reinforcing relatively thinplatelike members so as to facilitate the making of the latter,particularly it they are cast, and so as to reinforce and strengthen thesills and transverse members of the underframe.

In one form, my invention is adapted to form a portion of a tank such asa tender tank, and it is a further object of my inven- 9" tion toproduce a tank underframe casting in which the plate-like portions ofthe underframe are corrugated and serve as a portion of the tank.

v In the accompanying drawings which i illustrate my invention,-

Figure l is a top view of one-half of one side and one end of a tenderunderframe and tank bottom embodying my invention.

Figure 2 is a vertical longitudinal section taken on line 2-2 of Figure1.

Figure 3 is a transverse vertical section taken on line 3 3 of Figure 1.

Figures 4, 5 and 6 are corresponding views and sections illust-rating adifferent type of underframe adapted to be used :for ordinary freightcars or passenger cars or electric locomotives or other railway vehicleswhere the integral formation of the floor and the underframe sills,etc., may be advantageous.

The underframe illustrated in Figures 1, 2 and 3 is shown as consistingof a one-piece casting containing the usual center sills l, the ends ofwhich form draft sills 2. The casting also includes side sills 3, endsills 4, and transverse sills or transom-like members 5 and 6, members 5being indicated as bolsters through which the underframe is supportedupon the truck. The side sill and end sills are provided with suitablepads to which the superstructure plates P may be welded or riveted.

Integral with the sills referred to above is a horizontal wall or plate7 extending between the sills and imperforate throughout is length andwidth so as to form a liquidtight bottom 'for the vehicle. This wall 7is shown as being provided with a plurality of corrugations which maybe. disposed in any desired arrangen'lent as is best adapted for meetingthe various stresses which may be imposed upon the casting in themanufacture thereof or in its use after the vehicle is completed. Forexample. the eorrugations S at the left hand of Figure l are shown asextending longitudinally of the underframe and parallel with the sills iand 3 and transversely of the end sill it and the bolster' 5.Corrugations 9 in the intermediate portion of the underframe are shownas extending at right angles to eorrugations S and parallel with transommembers 5 and 6 but terinitiating short of center sill 'l and side sillThe corrugations 10 in the middle portion of the underframe are shown asbeing arcuate or circular and are disposed about a common center C.

Suitable reinforcing ribs 1l. are provided to brace wal-l 7. and theribs may loe arranged transversely of or parallel with the rorrugationsas desired. The transom elements 5 and 6 are provided with suitableopenings l2 which lighten the casting' and permit the free passage ofliquid from one end of the casting to the other.

It will be understood that the underframe is adapted to carry floorbeams` flooring and other superstructure on the sills and transoms inthe same manner as any ordinary underframe `and in addition the fulldepth of the underframe is available for use as a storage con'ipartmentfor liquids.

The provision of the corrugations El, 9. and 10 in the bottom wall ofthe casting relieves shrinkage strains in the casting as it cools afterpouring, and also assists in maintain ing a uniform thickness of thewall. This is due to the tendency of the corrugations to straighten ontwhen they are placed under tension whereby no part of the fluid metal inthe wall is drawn away from another part.

In the moditication illustrated in Figures 4, 5 and (i the plate-likemember 13 is l0- cated at the level of the top faces of the sills lll,I5 and I8 and holsters 17 and intermediate transoms 1S but, is formedintegrally therewith and is corrugated substantially throughout its areasimilar to the wall 7 of Figures 1, 2 and 3. The wall 13 is suitablyreinforced intermediate the sills and transoms by ribs 20. In thisstructure, I also illustrate the formation oli corrugations 19intermediate the center sills 1l which may be desirable.

Composition tiooring can be applied di-` rectly to the undertramewithout finishing the latter and without the" addition of otherelements, and the composition flooring `will fill the depressions in theplate and produce a level upper surface.

Obviously other variations in my invention may be made, and Icontemplate the exclusive use of the subject-matterV of my' invention asexpressed in my claims irrespective ot modications in thearrangement ofthe corriigations or variations inl the other details of theundertrarne.

I claim:

1. In aniinderrame for a railway vehicle, longitudinal and transversesills, and a corrugated horizontal wall extending between said sills andformed integrally therewith.

2'. In an underframe 'lor a railway vehicle, longitudinal and transversesills provided with surfaces adapted to mount tank superstructure, and acorrugated horizontal wall between said sills adapted to form the bottomof a tank structure.

3. In an iindertrame for a railway tank vehicle, a corrugated horizontalplate torming the bottom ot the tank structure'.

fl. In a east iindertframe, center sills, bolsters, and a corrugatedhorizontal wall connecting the lower edges ol said sills and holstersand forming therewith the lower portion of a tank structure.

5. In a cast iinderjtrame for a railway tank vehicle, a longitudinalsil-l, and a plate torminga taink bottom with corrugations extendingparallel with said sill.

6. In a cast iinderframe tor a railway tank vehicle, a transversetransom or like member, and a plate forminga tank bottom with corrugations extending parallel with said transom.

7. In a cast underiirame for a railway tank vehicle, longitudinal sills,transverse transom-like members, and a plate forming a tank bottombetween said sills and members and provided with arcuate corrugations.

8. ,In a east underframe for a railwaytank vehicle, longitudinal sills,transverse transom-like members, and a plate forming a tank bottombetweensaidsills and members and provided with a plurality ofcorruganeeaeee tions, the corrugations in different portions extendingin different directions.

9. In a east undert'rame for a railway tank vehicle, a horizontal plateforming a tank wall and having a series of parallel corrugations, and'an upstanding reinforcing rib extending across said corrugationsintermediate their ends.

10. Inv a cast un'dertrame for a railway tank vehicle, a horizontalplate forming a tank wall and having ar series oit parallelcorrugations, and an iipstandingv rib entending parallel with saidcorrugations along one ol the latter.

11. In a cast undertrame for a railway tank vehicle, a horizontal plateforming` a tank wall and havinga series of concentric arcuatecorrugations, and an upstanding re inforeing rib extending across saidcorrugations.

12. In a locomotive tender, a'tank having a corrugated'bottom forming apart of the tender undert'rame.

13. In ay locomotivetender, a. tank having` a bottom plate consi-sting`ot a corrugated casting forming part oit the tender under frame.

11i. In a cast u-ndertrame for a railway vehicle, longitudinal andtransverse sills and transoms, a corrugated horizontal wall extending`between said sills and transoms, and a reinforcing rib extending acrossthe corrugations of said wall intermediate said. sills and transoms.

15. In a cast iinderifrai'ne for a railway vehicle, spaced sills, ahorizontal plate extending` between said sills and having,` a se ries ofparallel oorrugations, and a reinforcparallel with said eorrugations.

16. In an underframe for a railway vehicle, spaced longitudinal sills,and a corrugated horizontal wall extending between said sills and formedintegrally therewith.

17. In an iinderframe for a railway vehicle, center sills, and a.corrugated horizontal wall extending. between said sills and formedintegrally therewith.

18. In an underframe for a railway vehicle, center sills, side siils,and a corrugated horizontal wall extendingr between adjacent side sillsand center sills and formed integrally therewith.

In testimony whereof I hereunto. at'rix my signature this 12th day ofFeb., 1927'.

CHARLES, `r. rnnnn..

ing rib extendingk between said sills andy

